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                  <h2 style="text-align: left;"><img
 title="7Z, ARC, ZIPX versus RAR, ZIPX benchmark for best, most powerful compressor format."
 alt="7z vs rar format" src="zip-files/extract-rar-files.png"
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                  <p><small><a name="Maximum_file_compression_benchmark"></a>PeaZip
is a free cross-platform file compressor application that provides an
unified
portable GUI for many Open Source technologies like 7-Zip, FreeArc,
PAQ, UPX... free alternative to WinRar, WinZip </small><small>and
similar
proprietary software</small><small>.<br>
- Create 7Z, ARC, BR, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ,
ZIP, ZST
files<br>
- Open and extract ACE, ARJ, CAB, DMG, ISO, LHA,
RAR, UDF, ZIPX files and more,</small><small> over 200 archive types
supported</small><small><br>
Features of PeaZip includes: </small><small> </small><small>archives
opener and extractor, </small><small>batch creation and </small><small>extraction
                  </small><small>of multiple
archives at once, </small><small>convert files, </small><small>create
self-extracting archives, split and join files,
strong encryption with two factor authentication, encrypted password
manager, </small><small>secure deletion, </small><small>find
duplicate files, </small><small>calculate hash and checksum,
export job definition as script.</small></p>
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COMPRESSION BENCHMARKS</a></small></td>
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            <td colspan="1" rowspan="1" style="vertical-align: top;"> <br>
            <h1 style="text-align: center;"><big><big><big><a
 name="best_compressor"></a>Maximum compression benchmark:
7z, arc, zpaq vs rar, zipx<br>
            </big></big></big></h1>
            <br>
            </td>
          </tr>
        </tbody>
      </table>
      </td>
    </tr>
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      <td
 style="background-color: rgb(104, 152, 248); vertical-align: top;">
      <table style="width: 960px; text-align: left;" border="0"
 cellpadding="0" cellspacing="0">
        <tbody>
          <tr>
            <td colspan="6" rowspan="1" style="vertical-align: top;">
            <div style="text-align: right;"><img
 alt="linux rar software" src="free-rar/file-compressor.png"
 style="width: 12px; height: 12px;"><br>
            </div>
            <div style="text-align: center;"><a
 style="color: rgb(253, 253, 253);"
 href="peazip-compression-benchmark.html">General-purpose compression
benchmark</a><span style="color: rgb(253, 253, 253);">&nbsp;&nbsp; </span><a
 style="color: rgb(253, 253, 253);"
 href="fast-compression-benchmark-brotli-zstandard.html">Brotli vs
Zstandard</a><span style="color: rgb(253, 253, 253);"><span
 style="color: rgb(253, 253, 253);">&nbsp; </span></span><span
 style="color: rgb(253, 253, 253);"></span><a
 style="color: rgb(253, 253, 253);"
 href="maximum-compression-benchmark.html">Maximum compression benchmark</a><span
 style="color: rgb(253, 253, 253);"></span><span
 style="color: rgb(253, 253, 253);"><a
 href="maximum-compression-benchmark.html"><span
 style="color: rgb(253, 253, 253);"></span></a></span> </div>
            <div style="text-align: right;"><img
 alt="open rar files on linux" src="free-rar/file-compressor.png"
 style="width: 12px; height: 12px;"><br>
            </div>
            </td>
          </tr>
        </tbody>
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 style="vertical-align: top; background-color: rgb(248, 247, 246);"><br>
      <table
 style="background-color: rgb(240, 240, 240); width: 960px; text-align: left;"
 border="0" cellpadding="24" cellspacing="0">
        <tbody>
          <tr align="left">
            <td
 style="background-color: rgb(255, 255, 255); vertical-align: top;">
            <div style="text-align: left; color: rgb(0, 0, 0);">
            <ul>
              <li>
                <p><a href="#maximum_file_compression">MAXIMUM
COMPRESSION BENCHMARK
SETTINGS</a></p>
              </li>
              <li>
                <p><a href="#best_compression_format">COMPRESSION /
DECOMPRESSION PERFORMANCES TEST</a></p>
              </li>
              <li>
                <p><a href="#best_file_compression_ratio">CONCLUSIONS:
BEST FILE COMPRESSOR<br>
                </a></p>
              </li>
            </ul>
            </div>
            <div style="text-align: left;"> </div>
            <div style="text-align: left;"> </div>
            <div style="text-align: justify;"> </div>
            <div style="text-align: justify;"> </div>
            <span style="font-weight: bold;"></span> </td>
          </tr>
        </tbody>
      </table>
      <table
 style="background-color: rgb(240, 240, 240); width: 960px; text-align: left;"
 border="0" cellpadding="24" cellspacing="0">
        <tbody>
          <tr align="left">
            <td
 style="background-color: rgb(255, 255, 255); vertical-align: top;">
            <div style="text-align: left; color: rgb(0, 0, 0);">
            <h2><big><big><big><a name="maximum_file_compression"></a><a
 href="#best_compressor">Maximum
compression benchmark
settings</a></big></big></big></h2>
            <h2><big> </big></h2>
            </div>
            <br>
            <table style="width: 100%; text-align: left;" border="0"
 cellpadding="0" cellspacing="0">
              <tbody>
                <tr>
                  <td style="vertical-align: top; width: 448px;">
                  <table
 style="background-color: rgb(240, 240, 240); width: 100%; text-align: left;"
 border="0" cellpadding="24" cellspacing="1">
                    <tbody>
                      <tr>
                        <td colspan="1" rowspan="1"
 style="vertical-align: top; background-color: rgb(250, 250, 250);">
                        <p><span style="font-weight: bold;">Goals</span></p>
                        <p><a name="best_file_compressor"></a>1)
Compare top compression formats 7Z, ARC, and
ZPAQ (from PeaZip) with RAR (WinRar) and ZIPX (WinZip) in terms of
maximum possible compression ratio.</p>
                        <p>2) Evaluate how each format scales in terms
of compression ratio improvements versus compression and extraction
speed reduction, with the increase of compression level.</p>
                        <ul>
                        </ul>
                        <ol>
                        </ol>
                        </td>
                      </tr>
                    </tbody>
                  </table>
                  <br>
                  <table
 style="background-color: rgb(240, 240, 240); width: 100%; text-align: left;"
 border="0" cellpadding="24" cellspacing="1">
                    <tbody>
                      <tr>
                        <td colspan="1" rowspan="1"
 style="vertical-align: top; background-color: rgb(250, 250, 250);">
                        <p><span style="font-weight: bold;">Software
settings<br>
                        </span></p>
                        <a name="best_compression_format"></a>Benchmarks
are conducted
on Windows 10 2009 64 bit using 64 bit versions of:<br>
                        <ul>
                          <li>PeaZip 7.3.1<br>
                          </li>
                          <li>WinRar 5.8</li>
                          <li>WinZip 24</li>
                        </ul>
All applications are tested using default,
out-of-the-box compression settings for the selected archive format.<br>
No cryptography option is set, since encryption impact on performances
is out of the scope of
this benchmark.<br>
                        </td>
                      </tr>
                    </tbody>
                  </table>
                  <br>
                  <table
 style="background-color: rgb(240, 240, 240); width: 100%; text-align: left;"
 border="0" cellpadding="24" cellspacing="1">
                    <tbody>
                      <tr>
                        <td colspan="1" rowspan="1"
 style="vertical-align: top; background-color: rgb(250, 250, 250);">
                        <p><span style="font-weight: bold;">Hardware
settings</span></p>
Notebook with Intel Core i7-8565U CPU, 4
physical cores with hyper-threading (8 logical cores), 8 GB RAM<br>
System disk 512 GB PCIe NVMe SSD, NTFS filesystem<br>
                        </td>
                      </tr>
                    </tbody>
                  </table>
                  </td>
                  <td style="vertical-align: top; width: 24px;"><br>
                  </td>
                  <td style="vertical-align: top; width: 448px;">
                  <table
 style="background-color: rgb(240, 240, 240); width: 100%; text-align: left;"
 border="0" cellpadding="24" cellspacing="1">
                    <tbody>
                      <tr>
                        <td colspan="1" rowspan="1"
 style="vertical-align: top; background-color: rgb(250, 250, 250);">
                        <div style="text-align: justify;">
                        <h3><span style="font-weight: bold;">Archive
formats compared in this benchmark</span><br>
                        </h3>
                        </div>
                        <div style="text-align: left;"> </div>
                        <ul>
                          <li><a href="7z-file-format.html"><span
 style="font-weight: bold;">7Z file
format</span></a>
(7-Zip, 1999) Open Source archive format, widely used and well-known
for excellent compression ratio, tested using default LZMA2 algorithm<br>
                          </li>
                        </ul>
                        <ul>
                          <li><a href="arc-file-format.html"><span
 style="font-weight: bold;">ARC file
format</span></a>
(FreeArc, 2007) Open Source archive format
designed aiming to superior compression. performances<br>
                          </li>
                        </ul>
                        <ul>
                          <li><a href="what-is-rar-file.html"><span
 style="font-weight: bold;">RAR file
format</span></a>
(RarLabs, 1995) proprietary archive format quickly building reputation
of being powerful compressor outperforming contemporary zip, bz2, and
ace formats. Latest RAR5 format revision is being tested.<br>
                          </li>
                        </ul>
                        <ul>
                          <li><a href="zipx-file-format.html"><span
 style="font-weight: bold;">ZIPX
file format</span></a>
(WinZip, 2008) designed to improve compression ratio over ZIP with
support for more compression algorithms. At minimum and default
compression level Deflate algorithm is used, at maximum compression
level WinZip tries to determine the most fit algorithm from supported
ones, including BZip2, LZMA and PPMd.<br>
                          </li>
                        </ul>
                        <ul>
                          <li><a href="zst-compressed-file-format.html"><span
 style="font-weight: bold;"></span></a><a href="paq-file-format.html"><span
 style="font-weight: bold;">ZPAQ format</span></a> (Matt Mahoney, 2009)
Open Source archive format, computing intensive, providing very high
compression ratio,
supersedes previous PAQ format, multiple times Hutter Prize winner.<br>
                          </li>
                        </ul>
                        <ul style="text-align: justify;">
                        </ul>
                        </td>
                      </tr>
                    </tbody>
                  </table>
                  <br>
                  <table
 style="background-color: rgb(240, 240, 240); width: 100%; text-align: left;"
 border="0" cellpadding="24" cellspacing="1">
                    <tbody>
                      <tr>
                        <td colspan="1" rowspan="1"
 style="vertical-align: top; background-color: rgb(250, 250, 250);">
                        <p><span style="font-weight: bold;">Input data</span></p>
                        <br>
Benchmark input, same of general purpose compression benchmark,
contains
42 files in 4 directories for total 303 MB
(318.000.857 bytes), composed by:<br>
                        <ul>
                          <li><a target="_blank"
 href="http://corpus.canterbury.ac.nz/descriptions/">Calgary
and
Canterbury compression corpora<img
 alt="Calgary Corpus, Canterbury corpus for standard compression tests"
 title="Standard compression corpus files" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a></li>
                          <li><a target="_blank"
 href="http://cs.fit.edu/%7Emmahoney/compression/enwik8.zip">enwik8<img
 alt="english wikipedia dump for data compression benchmark"
 title="Enwik8 compression test file" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a></li>
                          <li><a target="_blank"
 href="http://sun.aei.polsl.pl/%7Esdeor/index.php?page=silesia">Silesia
compression corpus<img
 alt="Silesia corpus for standard file compression benchmarks"
 title="Silesia corpus" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a></li>
                        </ul>
                        </td>
                      </tr>
                    </tbody>
                  </table>
                  </td>
                </tr>
              </tbody>
            </table>
            </td>
          </tr>
        </tbody>
      </table>
      <table
 style="background-color: rgb(240, 240, 240); width: 960px; text-align: left;"
 border="0" cellpadding="24" cellspacing="0">
        <tbody>
          <tr align="left">
            <td
 style="background-color: rgb(255, 255, 255); vertical-align: top;">
            <h3><big><big><big><a
 name="best_file_compression_performances"></a><a
 href="#best_compressor">Compression
/ decompression performances test<br>
            </a></big></big></big></h3>
            <br>
            <span style="font-weight: bold;">Maximum compression
benchmark methods</span><br>
            <br>
            <a name="7z_vs_rar_compression"></a>Benchmark
input data is saved to system disk (PCIe <span
 style="font-weight: bold;">SSD</span>) and compressed to system
disk, same partition, separate directory; the resulting archives are
then extracted to
separate directory on same (system) disk/partition.<br>
            <br>
Each compression and extraction test is repeated 10 times to get an
average value; size is expressed in MB, time in seconds.<br>
Each archive format is is tested with minimum (fastest non-store
level), default, and maximum
compression settings.<br>
Default compression algorithm and default compression settings, as
pre-set out of the box by file archivers being tested (PeaZip, WinRar,
and WinZip), are employed for each format / level.<br>
            <br>
            <span style="font-weight: bold;">Maximum compression
benchmark results
table, the lower the better for all columns<br>
            <br>
            </span>
            <table x:str="" style="border-collapse: collapse;"
 border="0" cellpadding="0" cellspacing="0">
              <col span="5" style="width: 68pt;" width="90"> <tbody>
                <tr style="height: 33.75pt;" height="45">
                  <td
 style="height: 32px; font-weight: bold; background-color: rgb(240, 240, 240); text-align: center; vertical-align: middle; width: 250px;"
 class="xl22">Utility, format, level<br>
                  </td>
                  <td class="xl23"
 style="border-left: medium none; height: 32px; width: 100px; font-weight: bold; background-color: rgb(240, 240, 240); text-align: center; vertical-align: middle;">Compression
SSD (sec)<br>
                  </td>
                  <td class="xl23"
 style="border-left: medium none; height: 32px; width: 100px; font-weight: bold; background-color: rgb(240, 240, 240); text-align: center; vertical-align: middle;">Archive
size (MB)</td>
                  <td class="xl23"
 style="border-left: medium none; height: 32px; width: 100px; font-weight: bold; background-color: rgb(240, 240, 240); text-align: center; vertical-align: middle;">Compression
ratio<br>
                  </td>
                  <td class="xl23"
 style="border-left: medium none; height: 32px; width: 100px; font-weight: bold; background-color: rgb(240, 240, 240); text-align: center; vertical-align: middle;">Extraction
                  <br>
SSD (sec)</td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">PeaZip,
7Z, fastest<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">3.5<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">92.90<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">30.66%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">0.9<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">PeaZip,
7Z, default<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">39.6<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">73.60<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">24.29%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">1.0<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">PeaZip,
7Z, ultra<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">125.0<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">71.40<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">23.56%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">2.7<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">PeaZip,
ARC, 1<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">1.4<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">109.00<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">35.97%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">1.9<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">PeaZip,
ARC, 4<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">17.2<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">71.70<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">23.66%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">7.1<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">PeaZip,
ARC, 9<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">81.0<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">66.10<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">21.82%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">40.8<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">PeaZip,
ZPAQ, fast<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">6.3<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">102.00<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">33.66%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">2.1<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">PeaZip,
ZPAQ, normal<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">37.2<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">68.50<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">22.61%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">26.8<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">PeaZip,
ZPAQ, ultra<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">354.0<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">57.60<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">19.01%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">356.0<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">WinRar,
RAR, fastest<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">2.0<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">106.00<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">34.98%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">1.0<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">WinRar,
RAR, normal<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">13.8<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">80.40<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">26.53%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">1.0<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">WinRar,
RAR, best<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">48.0<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">78.90<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">26.04%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">1.8<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">WinZip,
ZIPX, fastest<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">3.0<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">105.00<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">34.65%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">4.5<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">WinZip,
ZIPX, enhanced deflate<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">21.0<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">94.00<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">31.02%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">5.0<br>
                  </td>
                </tr>
                <tr style="height: 24pt;" height="32">
                  <td class="xl24"
 style="border-top: medium none; height: 32px; text-align: center; vertical-align: middle; width: 250px;">WinZip,
ZIPX, best method<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="12.1">34.7<br>
                  </td>
                  <td class="xl26"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="97.7">70.70<br>
                  </td>
                  <td
 style="text-align: center; vertical-align: middle;">23.33%<br>
                  </td>
                  <td class="xl25"
 style="border-top: medium none; border-left: medium none; height: 32px; width: 100px; text-align: center; vertical-align: middle;"
 x:num="1.6">46.2<br>
                  </td>
                </tr>
              </tbody>
            </table>
            <span style="font-style: italic;"></span><br>
            <br>
            <h2 style="font-weight: bold;">Maximum compression ratio
results</h2>
            <br>
ZPAQ reached maximum compression ratio, compressing the 303.00 MB input
down to 57.60 MB (19.01%), followed by ARC with output reduced to 66.10
MB. ZIPX and 7Z were able to reduce the input size to 70.70 MB and
71.40 MB respectively, and RAR scored the most poor compression
performance with 78.90 MB output employing best compression setting.<br>
All format shown a significant improvement in compression ratio
switching from fastest to best compression settings, but for most
formats most of the advantage emerged switching from fastest to default
compression settings.<br>
Especially, 7Z and RAR format shown very small improvements from
default to ultra settings - which, as you can see in following chapter,
comes at cost of much longer compression times.<br>
The exception to this behavior is ZIPX format, providing a mediocre
deflate based compression unless switching to alternate compression
algorithms, with maximum compression, comparable to 7Z ultra, being
attained using "best method" settings.<br>
            <br>
            <h3><img alt="best file compressor"
 title="best compressor 7z, arc, zpaq versus rar, zipx"
 src="maximum-compression-benchmark.png"
 style="width: 720px; height: 460px;"></h3>
            <br>
            <h2 style="font-weight: bold;">Maximum compression speed
results</h2>
            <br>
Compression times increases for all format with the increase of
compression settings, generally with best returns (in terms of
compression ratio improvements) switching from fastest to default
compression settings, and diminishing returns switching to ultra/best
settings.<br>
At maximum compression level, ZIPX is the fastest format, followed by
RAR, ARC, and 7Z, ZPAQ being the slowest.<br>
Using moderate compression settings, RAR and ARC emerge as the fastest
formats.<br>
            <br>
            <h3><img alt="7z, arc, zipx versus rar, zipx format"
 title="Comparison of compression speed: 7z, arc, zpaq vsrar, zipx"
 src="maximum-compression-speed.png"
 style="width: 720px; height: 460px;"></h3>
            <br>
            <h2 style="font-weight: bold;">Maximum compression
extraction speed results</h2>
            <br>
RAR and 7Z formats shows a clear advantage in terms of extraction speed
compared to all other formats, with decompression times staying under 3
seconds even at higher compression levels.<br>
ARC, ZIPX, and ZPAQ decompression speed increases significantly at high
compression settings, with ARC being generally comparable or better in
speed than ZIPX, and ZPAQ being the slowest.<br>
            <br>
            <h3><img alt="7z, arc, zipx vs rar, zipx performances"
 title="Decompression speed benchmark: 7z, arc, zpaq, rar, zipx"
 src="maximum-decompression-speed.png"
 style="width: 720px; height: 460px;"></h3>
            </td>
          </tr>
        </tbody>
      </table>
      <table
 style="background-color: rgb(240, 240, 240); width: 960px; text-align: left;"
 border="0" cellpadding="24" cellspacing="0">
        <tbody>
          <tr align="left">
            <td
 style="background-color: rgb(255, 255, 255); vertical-align: top;">
            <h3><big><big><big><a name="best_file_compression_ratio"></a><a
 href="#best_compressor">Conclusions</a></big></big></big></h3>
            <br>
            <span style="font-weight: bold;">ZPAQ is the winner in
terms of maximum attainable compression</span>,
but is slower than other formats.<br>
ZPAQ at maximum compression level reached a 19.01% compression ratio
versus 21.82% reached by ARC at maximum compression level, the second
best result of the benchmark.<br>
Anyway, even ZPAQ at default level can compare favorably (in terms of
compression ratio versus speed tradeoff) with other formats at best
compression settings - only ARC at highest level surpassing its
compression ratio - with a 10x speed advantage of ZPAQ default
vs ZPAQ ultra.<br>
            <br>
For all formats excluding ZIPX, average compression settings
represented an optimal tradeoff between compression ratio and
compression speed, with diminishing returns for switching to highest
compression levels.<br>
For all format each compression level increase represented an higher
computational cost (with longer compression times), for smaller
improvements in compression ratio.<br>
            <br>
For this reason it can be recommended to use other methods than
increasing compression level to keep the output below a desired
threshold, in example <a href="file-split.html">spanning the outpput
to
multiple volumes</a> of fixed size in order to meet maximum size
constrains, or <a href="duplicates-hash-checksum.html">deduplicate
input data</a> before
compression.<br>
This is even more true when compressing data sets containing
multimedia, or encrypted files, which generally <a
 href="why-can-not-compress-pdf-avi-mp3-files.html">does not compress
well</a>, or does not compress at all regardless employed
algorithm/settings.<br>
            <br>
Unlike compression speed, which generally scaled uniformly with
increasing of compression level, extraction speed was more correlated
with the archive format nature, with 7Z and RAR decompression times
remain fast (well below 3 seconds) at any compression level.<br>
            <br>
In brief:<br>
            <br>
            <h3><span style="font-weight: bold;">What is the most
powerful file compressor?</span></h3>
ZPAQ is clearly the top performing format in this benchmark focused on
maximum attainable compression.<br>
            <br>
            <h3><span style="font-weight: bold;">What is the overall
best compression format?</span></h3>
            <a name="top_file_compressor"></a>It depends on user's
need, with compression ratio being only one factor
of the equation.<br>
ZPAQ and ARC are the best compressors, but 7Z and RAR formats has a
clear advantage in terms of decompression speed, faster
than for any other tested format.<br>
            <br>
            <h3><span style="font-weight: bold;">7Z vs RAR, which is
the best compressor?<br>
            </span></h3>
            <a name="7z_versus_rar"></a>7Z outperformed RAR in terms of
compression ratio at all compression
levels, but RAR outperformed 7Z in terms of compression speed. <br>
Extraction speed is quite similar, and keeps reasonable for both
formats at all compression levels. <br>
            <br>
            <h3><span style="font-weight: bold;">Is it worth to set
best /
maximum / ultra compression settings?</span></h3>
Increasing compression level decreases performances with diminishing
returns. File spanning and data deduplication are recomended in
alternative.<br>
            </td>
          </tr>
        </tbody>
      </table>
      <table
 style="background-color: rgb(240, 240, 240); width: 960px; text-align: left;"
 border="0" cellpadding="24" cellspacing="0">
        <tbody>
          <tr align="left">
            <td
 style="background-color: rgb(255, 255, 255); vertical-align: top;">
            <table style="text-align: left;" border="0" cellpadding="6"
 cellspacing="0">
              <tbody>
                <tr>
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                  </small></td>
                  <td
 style="vertical-align: top; background-color: rgb(240, 239, 238);"><small><a
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      <table
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            <td style="vertical-align: top;">Tag Cloud<br>
            <span class="wrd free-rar0"
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performances</a></span> <span class="wrd free-rar0"
 id="7zip-7z-format-features"> <a href="7z-file-format.html">7Z format
features</a></span> <span class="wrd free-rar1"
 id="compression-formats-comparison"> <a
 href="archive-file-formats-comparison.html">compression formats
comparison</a></span> <span class="wrd free-rar0" id="compress-graphic">
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graphic files</a></span><br>
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virtual machines</a></span> <span class="wrd free-rar3"
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compression format</a></span> <span class="wrd free-rar1"
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 class="wrd free-rar1" id="file-spanning-utility"> <a
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archives at once</a></span> <span class="wrd free-rar2"
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compression utility</a></span><br>
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files</a></span> <span class="wrd free-rar1"
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rar zip archives</a></span> <span class="wrd free-rar3"
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features</a></span> <span class="wrd free-rar0"
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RAR extractor</a></span> <span class="wrd free-rar3"
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opener</a></span> <span class="wrd free-rar4"
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ZIP files utility</a></span> <span class="wrd free-rar2"
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extraction</a></span> <span class="wrd free-rar0"
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extraction</a></span> <br>
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files opener</a></span> <span class="wrd free-rar3"
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            <a href="index.html">file compression software</a></span> <span
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compression utility</a></span> <span class="wrd free-rar2"
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WinZip WinRar alternative</a></span> <span class="wrd free-rar3"
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application</a></span> <span class="wrd free-rar3"
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 href="self-extracting-archives.html">SFX</a></span><br>
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 id="linux-file-compression-utility"> <a href="peazip-linux.html">Open
Source WinZip Winrar alternative for Linux</a></span> <span
 class="wrd free-rar1" id="windows-rar-extractor"> <a
 href="download-installer-p-windows.html">windows rar tar zip files
extractor</a></span> <span class="wrd free-rar3"
 id="best-file-decompression-utility"> <a
 href="peazip-compression-benchmark.html">fastest
archive decompression utility</a></span><br>
            <span class="wrd free-rar2" id="best-file-archiving-format"><a
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archiving formats</a></span> <span class="wrd free-rar1"
 id="best-file-compression-standard"> <a
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file
compression format</a></span> <span class="wrd free-rar3"
 id="fast-drag-and-drop-extraction"> <a
 href="screenshots-peazip-3.html">fast drag
and drop extraction</a></span> <span class="wrd free-rar0"
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bit zip application for Windows</a></span><br>
            <span class="wrd free-rar3" id="7zip-vs-winrar"> <a
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            <span class="wrd free-rar1"
 id="peazip-winrar-winzip-comparison"> <a
 href="peazip-compression-benchmark.html">PeaZip performances comparison</a></span>
            <span class="wrd free-rar3" id="best-file-compressor"> <a
 href="maximum-compression-benchmark.html">best file compressor</a></span><a
 href="maximum-compression-benchmark.html"><br>
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